Jetpack script (method recommended for use)?

I was going about scripting a jetpack that elevates the player's character when a certain button is pressed, and deactivates when the button is released. Everything works just fine, but the only thing is that I want the character to be able to be walking in different directions while in-air. I used BodyVelocity to elevate the character, the only problem is that it only elevates the character and does not allow the character to move while in air. So I was wondering if there was some sort of way to go about making the characters move in mid air. I am not asking for the script, I am only asking for methods.

Thanks in advance.